Attachment for pipe-cutters



C. -KLUG.

ATTACHMENT FOR PIPE CUTTERS.

APPLICATTON FILED rzmzl. l9l9.

Patented Feb. 10,1920

2 SHEETS-SHEET 1- 0. KLUG. ATTACHMENT FOR PIPE CUTTERS. APPLICATIONHLED FEB. 21. \9|9' Patented Feb. 10,1920.

ZSHEET SSSSSSS 2- v CHARLES KLUG, or PHILADELPHIA, PENNSYLVANIA. I I

ATTACHMENT FORl PIPE-CUTTERS.

T 0 all whom it may concern:

Be it known that I, CHARLES KLUG, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in Attachments for Pipe-Cutters, of which the following is a specification.

My invention relates to a new and useful improvement in such attachment for pipe cutters, and especially for that class and of such cutters as are designed for cutting large diameter pipe, and has for its object to overcome the serious disadvantages which have heretofore been attendant upon such pipe cutters by providing means for guiding the pipe cutter around the pipe at right angles thereto and permitting only one of the three usual cutters to act upon the pipe so as to produce a pilot track. 7

A still further object of. my invention is to so construct such means that it may be removed after the pilot is cut so that thereafter the three ordinary cutters of the tool may be broughtinto action and guided so that the pipe will cut square and true.

lVith these ends in View, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, I will describe its construction in detail referring by numerals to the accompanying drawing forming a. part of my application, in which Figure 1, is a side view of the pipe cutter of the design intended for cutting pipes of large diameter, showing my attachment thereon.

Fig. 2, is an enlarged side elevation of my improved attachment removed from the pipe cutter.

Fig. 3, is an end View of Fig. 2.

Fig. 4, is a bottom plan view of Fig. 2.

Fig. 5, is a further enlarged plan view of the major portion of the body of the pipe cutter showing my improvement applied thereto. v

Fig. 6, is a section on the line 6-6 of Fig. 5, the shoe being removed and a pipe shown in position between the cutting disks.

In carrying out my invention as here empose.

Specification of Letters Patent. Patented Feb. 10, 192 0 Application filed February 27, 1919. Serial No. 279,509.

bodied 1 represents the body of the pipe cutter of the design for cutting pipes of large diameter having the usual disk cutters-2 ournaled in the outer portion thereof, while the disk cutter 3 is journaled in the sliding block 1 which is operated by the screw 5 threaded through the lug 6, whichlatter is formed with the body 1. i

7 represents a shoe which has the flanges 8, which flanges are adapted to-straddle the body 1 fitting snugly. upon bothsides thereof, the shoe resting upon the upper-curved surface of the body as clearly shown in Each of the flanges S is of suchwidth as to pass between-and bear against the pintles '9 of the cutter disks 2, said pintles projecting from the sides of the body for that pur- By this arrangement when the shoe 1s in place upon the cutter it will beheld against longitudinal ,movement upon the curved surface of said cutter. I

In the shoe are formed two slots 10 here shown as V shaped, which slots are forthe purpose of preventing the cutter disks from coming incontact with the shoe when the latter is placed upon the body 'ofthe pipe cutter leaving these cutter disks idle and ,unaffected by the placing of the shoe in operative position. v r e The shoe 7 is of considerable width relatively to the width of the body 1 of the pipe cutter. It therefore overhangs the sides of said body and has journaled therein the rolls 11 by means of the pintles 12, and these rolls are four in number, arrangedin pairs adjacent the sides of the shoe and project above the upper concavcd surface of the shoe as clearly shown.

In practice the shoe is readily placed upon the cutter and held in place Without the necessity of screws or clamps and as readily removed therefrom.

From the foregoing description the operation of my improvement. will be obviously as follows 1 The shoe having been placed in position upon the body of the cutter, the cutter is placed around the pipe as indicated in Fig. 6 when by setting upupon the screw 5 the cutting disk 3 is brought into firm contact pipe Will bring the pipe cutter into true alinement or at exact right angles to the axial center of the pipe. Now by revolving the cutter around the pipe the cutter disks 3 will out an initial groove or pilot track inafter-the revolving of the cutter around the pipe will continue the cutting operation in the usual manner until the pipe has been severed, when it will be found that the end of the pipe thus cut will be at true right angles to the axial center line thereof.

The results produced by my improvement above described is of great advantage, since by cutting the pipe true the threading of the pipe will be greatly facilitated, since the threading dies will take hold of the end thereof in such manner as to produce a true thread.

Heretofore the cutting of a pipe by the hand cutter almost invariably makes a bad end and when the pipe is threaded makes a badly distorted thread, and when pipes thus cut and threaded are coupled together it is exceedingly difficult to bring them into alinement and in handling pipes of large diameter this causes great loss of time and unsatisfactory Work.

Of course I do not wish to be limitedto the exact details of construction as herein shown, asthese may be varied within the limits of the appended claims without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new anduseful is 1.In a pipe cutter a body, two cutting disks journaled in said body, an adjustable block mounted upon the body, a cutter disk journaled in said block, and a shoe'adapted to fit over the disks journaled in the body, said shoe having two pairs of rolls journaled therein adapted to bear and travel upon a pipe being cut.

2. In combination with the body of a pipe cutter of the character described having two cutter disks j ournaled therein; a shoe, adapted to fit over a portion of said'body and cover the cutting disks, and two pairs of rolls journaled in said shoe adjacent the sides thereof.

3. In a cutter of the character described two cutting disks journaled in the outer portion of the body thereof, pintles upon which. said disks are journaled having their outer ends projecting beyond the sides of the cut-' ter body, a shoe having slots formed therein for receiving the upper edges of the cutter disks, flanges formed with the shoe, portions of said flanges being adapted to enter into engagement with the pintles of the cutting disks and four rolls j ournaled in the shoe adapted to position the pipe cutter upon the pipe. v

4. An attachment for pipe cutters of the characters described consisting of a shoe having slots formed therein, flanges formed therewith and four rolls journaled in said shoe, in paths adjacent the sides thereof.

In testimony whereof I have hereunto affixed my signature.

CHARLES KLUG. 

